Re: Question on BIGGEST_ALIGNMENT in GCC on NetBSD/m68k

[John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>]

On Sat, 2025-06-07 at 23:43 +0200, Andreas Schwab wrote:
> On Jun 07 2025, Jason Thorpe wrote:
> 
> > https://m680x0.github.io/ref/sysv-m68k-abi-part1.pdf
> 
> How is that relevant?

It's relevant because it's the official ABI and GCC suggests in it's
headers that it's SVR4-compliant on Linux.

Anyway, having this discussion isn't really leading anywhere. Let's
just agree that we disagree on what the canonical source for an ABI
specification is. You have explained your point of view and I can
understand your reasoning.

However, that doesn't help with the current situation which is that the
number of packages that fail to build from source on m68k on Linux is
increasing and it's becoming more difficult to maintain the port.

Both Debian and Gentoo want to address this problem by changing the default
alignment and both have already performed initial bootstraps with 32-bit
alignment which showed promising results.

The question now only remains what the preferred way of implementing this
change is. Since there are no other Linux distributions left that maintain
support on m68k, I think it's reasonable to expect that both Debian and Gentoo
get to have a word in this discussion, don't they?

Adrian

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